| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 96 | 93 |
| 2015 | 108 | 91 |
| 2014 | 120 | 92 |
| 2013 | 121 | 93 |
| 2012 | 113 | 94 |
| 2011 | 108 | 91 |
| 2010 | 79 | 98 |
| 2009 | 64 | 102 |
| 2008 | 77 | 101 |
| 2007 | 53 | 105 |
| 2006 | 42 | 107 |
| 2005 | 33 | 107 |
| 2004 | 27 | 112 |
| 2003 | 21 | 112 |
| 2002 | 17 | 118 |
| 2001 | 17 | 115 |
| 2000 | 15 | 117 |
| 1999 | 16 | 113 |
| 1998 | 15 | 115 |
| 1997 | 13 | 116 |
| 1996 | 14 | 113 |
| 1995 | 17 | 101 |
| 1994 | 15 | 99 |
| 1993 | 15 | 91 |
| 1992 | 15 | 90 |
| 1991 | 15 | 87 |
| 1990 | 10 | 98 |
| 1989 | 10 | 95 |
| 1988 | 8 | 101 |
| 1987 | 9 | 98 |
| 1986 | 9 | 92 |